U.S. patent application number 12/464885 was filed with the patent office on 2009-12-31 for lens mold.
This patent application is currently assigned to HON HAI PRECISION INDUSTRY CO., LTD.. Invention is credited to HOU-YAO LIN, SHENG-JUNG YU.
Application Number | 20090324769 12/464885 |
Document ID | / |
Family ID | 41447769 |
Filed Date | 2009-12-31 |
United States Patent
Application |
20090324769 |
Kind Code |
A1 |
LIN; HOU-YAO ; et
al. |
December 31, 2009 |
LENS MOLD
Abstract
A lens mold comprises a first pressing portion, a second
pressing portion, and a shaping portion disposed between the two,
which comprises an upper slide and a lower slide. The upper slide
and the lower slide are connected to the second pressing portion,
and can slide along each other. A mold cavity in fluidic
communication with a flow path and the inlet such that the lens
material flows from the inlet to the mold cavity along the flow
path to form a shaped lens. After the lens is formed, the upper
slide and the lower slide away from each other separately, where a
part of the shaped lens is remains in a recess defined in the
second pressing portion, to help release the shaped lens from the
mold.
Inventors: |
LIN; HOU-YAO; (Tu-Cheng,
TW) ; YU; SHENG-JUNG; (Tu-Cheng, TW) |
Correspondence
Address: |
PCE INDUSTRY, INC.;ATT. Steven Reiss
288 SOUTH MAYO AVENUE
CITY OF INDUSTRY
CA
91789
US
|
Assignee: |
HON HAI PRECISION INDUSTRY CO.,
LTD.
Tu-Cheng
TW
|
Family ID: |
41447769 |
Appl. No.: |
12/464885 |
Filed: |
May 13, 2009 |
Current U.S.
Class: |
425/542 |
Current CPC
Class: |
Y10S 425/808 20130101;
B29C 45/27 20130101; B29D 11/00432 20130101; Y10S 425/005 20130101;
B29C 45/40 20130101; B29D 11/00192 20130101; B29L 2011/0016
20130101 |
Class at
Publication: |
425/542 |
International
Class: |
B29C 45/26 20060101
B29C045/26 |
Foreign Application Data
Date |
Code |
Application Number |
Jun 30, 2008 |
CN |
200810302485.4 |
Claims
1. A lens mold, comprising: a first pressing portion defining an
inlet to receive material to make a lens; a second pressing
portion; a shaping portion disposed between the first pressing
portion and the second pressing portion, the shaping portion
comprising an upper slide and a lower slide connected to the second
pressing portion, the upper and lower slides configured for sliding
along each other; a mold cavity in fluidic communication with a
flow path and the inlet such that the lens material flows from the
inlet to the mold cavity along the flow path, the mold cavity and
the flow path contoured to define at least one surface of the lens,
wherein contours of the mold cavity and the flow path are defined
when the upper slide and lower slide close; and a recess defined on
a surface of the second pressing portion that is adjacent to the
shaping portion, the recess in fluidic communication with the flow
path when the upper slide and the lower slide close so as to
receive a portion of the lens material.
2. The mold for shaping a lens as claimed in claim 1, wherein the
first pressing portion comprises a first base and a first pad
disposed on a surface of the first base that is in proximity to the
shaping portion.
3. The mold for forming lens as claimed in claim 1, wherein the
second pressing portion includes a second base and a second pad
provided on a surface of the second base that is adjacent to the
shaping portion, the upper slide and the lower slide being
connected to the second pad of the second pressing portion.
4. The mold for shaping a lens as claimed in claim 3, wherein the
recess is defined on the surface of the second pad.
5. The mold for shaping a lens as claimed in claim 1, wherein the
mold cavity is uniformly distributed along the flow path.
6. The mold for shaping a lens as claimed in claim 1, wherein the
upper slide and the lower slide are connected to the second
pressing portion via a pulley or a rail system.
Description
BACKGROUND
[0001] 1. Technical Field
[0002] The disclosure is related to lenses, and particularly, to a
projection shaping mold for plastic lenses.
[0003] 2. Description of Related Art
[0004] As electronic devices are produced with increasingly small
profiles, lenses for smaller devices must be thinner than before.
Plastic lenses for electronic devices are often shaped and formed
in a mold where removal of the plastic lenses from the mold is
often done by a pushing pin. However, after being shaped, a thin
lens may be easily damaged when pushed from the mold in the manner
described, resulting in poor yield.
BRIEF DESCRIPTION OF THE DRAWINGS
[0005] FIG. 1 is a cross-section of the lens mold as disclosed.
[0006] FIG. 2 is a cross-section of the lens mold as disclosed when
the mold is opened.
[0007] FIG. 3 is a cross-section of the lens mold as disclosed
showing the lens ready for removal from the mold.
[0008] FIG. 4 is a top view of the shaping portion in the lens mold
as disclosed.
DETAILED DESCRIPTION
[0009] FIG. 1 showing a lens mold 1 comprising a first pressing
portion 10, a shaping portion 12 and a second pressing portion 14.
The shaping portion 12 is disposed between the first pressing
portion 10 and the second pressing portion 14, where the first
pressing portion 10 and the second shaping portion are both
configured for tightly pressing the shaping portion 12.
[0010] The first pressing portion 10 comprises a first base 101 and
a first pad 102. An inlet 1011 is disposed near the center of a
surface 101a of the first base 101, away from the shaping portion
12. The first pad 102 is disposed on a surface 101b of the first
base 101, in proximity to the shaping portion 12. An injection path
1a is extended from the inlet 1011 to the shaping portion 12.
[0011] The second pressing portion 14 comprises a second base 141
and a second pad 142. The second pad 142 is disposed on a surface
141b, in proximity to the shaping portion 12. A recess 1c is
disposed on a surface of the second pad 142, in proximity to the
shaping portion.
[0012] As shown in FIG. 1 and FIG. 4, the shaping portion 12 is
disposed between the first pressing portion 10 and the second
pressing portion 14, and also disposed between an upper slide 121
and a lower slide 122. When the upper slide 121 and the lower slide
122 close together, a mold cavity 123 and a flow path 1b are formed
internally for shaping the lens, which are in fluidic communication
with each other. The mold cavity 123 and the flow path 1b are
contoured so as to define at least one surface of the lens. As FIG.
4 shows, the mold cavity 123 is distributed symmetrically on two
opposite sides of the path 1b. The upper slide 121 and the lower
slide 122 are connected to the second pad 142, and are configured
for sliding relative to the second pad 142 via a pulley or rail
system. Accordingly, the upper slide 121 and the lower slide 122
achieve the mold release.
[0013] Referring to FIGS. 1-4, when the upper slide 121 and the
lower slide 122 close, melted plastic flows through the inlet 1011
of the first pressing portion into the flow path 1b of the shaping
portion 12 along the injection path 1a. The melted plastic then
fills the mold cavity 123 through the branch flow path 1b', where a
portion of the melted plastic is also received in the recess 1c.
The melted plastic is cooled inside the shaping portion 12, and
shaped into a lens. After the lens is shaped, the first pressing
portion 10 is separated from the shaping portion 12, and the upper
slide 121 slips upwards and the lower slide 122 downwards so as to
slip away from each other. Because the shaped lens is partially
received in the recess 1c, the shaped lens is released from the
upper slide 121 and the lower slide 122, and can be removed from
the mold by a robot manipulator. Thus, the lens partially received
in the recess 1c is protected from damage caused by a pushing
pin.
[0014] While the invention has been described by way of example and
in terms of preferred embodiment, it is to be understood that the
invention is not limited thereto. To the contrary, it is intended
to cover various modifications and similar arrangements (as would
be apparent to those skilled in the art). Therefore, the scope of
the appended claims should be accorded the broadest interpretation
so as to encompass all such modifications and similar
arrangements.
* * * * *